D.K.
Hi L.,
I have several friends who are artists / photographers you could consider.
Kristy Urgo "Golden Photograpy" www.kristygolden.com. She lives in Philly, but has a large family located in Montgomery County and comes to visit often. She may also refer you to other photographers who are local.
Mary Clayton "MCC Artists" www.mccartists.com She lives and primarily works in the DC area.
Cynthia Sambro-Rier "Cynthia Sambro-Rier Photography" www.cynthiasambrorier.com. She shot my friends wedding and has also done some work for that friends family members with kids.
Michael Colella "Colella Photography" www.colellaphoto.com. He is a close family friend, shot our wedding and has done family portraiture for us for years. Has a great studio in his home and backyard in Kensington.
Good luck! I'm sure you will be happy with anyone you choose. Nothing is better than beautiful photos of your kids :)
Best wishes,
D.